Structural Optimization of 1, 2-dibromoethane-filled Hexagonal Photonic Crystal Fiber Based on As39Se61 Glass for Super-continuum Applications

In this work, a highly nonlinear chalcogenide photonic crystal fiber (PCF) infiltrated with 1, 2-dibromoethane (C2H4Br2) has been numerically proposed to generate a super-continuum application. The proposed PCF exhibits numerous significant optical guiding properties, including dispersion, effective mode area, and nonlinearity. The simulation results show that the optimized PCF with lattice constant Λ = 2.0 μm and filling factor f = 0.5 exhibits all normal dispersion regions. The optimized fiber has a maximum point of the dispersion curve at a wavelength of 3.15 μm, which is closest to the pump wavelength of 3.0 μm. At the pump wavelength of 3.0 μm, the optimized fiber has a dispersion value of -20.05 ps/nm/km, an effective area of ​​5.88 µm², and a nonlinearity coefficient of 7837.63 w⁻¹km⁻¹. This nonlinearity coefficient value is very high compared to other fibers. The estimated parameters are suitable for further simulation and investigation of the design for broadband super-continuum generation. Keywords: Photonic crystal fiber, dispersion characteristics, chalcogenide, liquids.